title: Complete assignments of 1H and 13C NMR spectral data for three new triterpenoid saponins from Ilex hainanensis Merr.
abstract: Three new oleanane-type triterpenoid saponins, ilexhainanoside C, D and E, all with 24, 28-dioic acid groups, were isolated from the leaves of Ilex hainanensis. They were 3beta-hydroxyolean-12-ene-24, 28-dioic acid-28-O-beta-D-glucopyranoside(1), 3beta, 19alpha-dihydroxyolean-12-ene-24, 28-dioic acid-28-O-beta-D-glucopyranoside(2) and 3beta, 29-dihydroxyolean-12-ene-24, 28-dioic acid-28-O-beta-D-glucopyranoside(3). The structures of these three new compounds were elucidated and complete assignments of the (1)H and (13)C NMR spectroscopic data were achieved by 1D and 2D NMR experiments [heteronuclear single quantum coherence (HSQC), HMBC and rotational nuclear Overhauser effect spectroscopy (ROESY)].
authors.affiliation: Key Laboratory of Modern Chinese Medicines (China Pharmaceutical University), Ministry of Education, Nanjing 210009, People's Republic of China.
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Chen
authors.forename: Jie
authors.initials: J
authors.lastname: Yang
authors.forename: Xiao-Xiao
authors.initials: XX
authors.lastname: Liu
authors.forename: Mao-Xiang
authors.initials: MX
authors.lastname: Lai
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
mesh_terms: D002247:Carbon Isotopes; D030017:Ilex / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D012503:Saponins / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry
chemical_list: D002247:Carbon Isotopes; D012503:Saponins; D014315:Triterpenes